Gacha Probability Calculator
Pull odds calculator with pity and constellation simulator
入力
計算結果
確率カーブ
何回引けば当たる？
運勢チェッカー
あなたのガチャ結果は運が良かった？悪かった？
完凸シミュレーター
天井・すり抜けを考慮した完凸シミュレーション
累積確率テーブル
| 試行回数 | 確率 | 費用 |
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About Gacha Probability Calculator
The Gacha Probability Calculator helps mobile game players estimate pull odds, pity outcomes, expected pulls, and cost before spending in-game currency. It supports basic drop-rate math as well as pity, 50/50 guarantee, and multi-copy goals similar to constellation or NP systems.
Use the basic calculator to see the chance of getting at least one target item after a number of pulls, or reverse-calculate how many pulls are needed for a target probability. The simulator runs 10,000 trials to show average, median, and unlucky-case estimates, making it useful for budget planning and luck checks.
Everything runs locally in your browser, so your text, numbers, or files are not uploaded to a server. No account is required, and the tool is free to use on desktop or mobile.
How to use Gacha Probability Calculator
- Enter drop rate, pull count, and optional cost per pull.
- Review cumulative odds, expected value, failure rate, and pulls needed for a target probability.
- Use presets or custom settings when you need pity, guarantee, or multi-copy simulation.
Benefits of Gacha Probability Calculator
- Combines pull odds, expected value, pity, and cost planning in one browser tool.
- Simulation results show median and unlucky-case estimates, not only the average.
- Useful before spending currency, with all calculations kept local in the browser.
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